- Compare the partial and complete response rates in patients with relapsed, CD20 positive, aggressive B-cell non-Hodgkin's lymphoma treated with dexamethasone, cisplatin, and cytarabine in combination with etoposide, ifosfamide, and methotrexate with or without rituximab followed by carmustine, etoposide, cytarabine, melphalan, and autologous peripheral blood stem cell transplantation (APBSCT).